Air-vent



C. F. NYSTROM.

AIR VENT.

APPLICATION FILED JAH.30,1917.

Patented Aug; 17 1920 INVENTOR UNITED- STATES CARL F. NYSTR-OM, OF NEWYORK, N. Y.

AIR-VENT.

Application filed January 30, 1917.

To all whom it may concern Be it known that I, CARL F. NYsTnoM, citizenof the United States, and resident of the borough of Manhattan, in thecity and county of New York and State of New York, have invented certainnew and useful Improvements in Air-Vents, of which the following is aspecification.

My invention relates to air valves for normally closed receptacles'andmore particularly to valves for gasolene or other fuel tanks of motorvehicles and has for its object to provide a simple and eflicient constrction whereby air is freely admitted to the interior of the tank whennecessary, and whereby water, moisture, dirt and other foreign matter isefiiciently excluded therefrom. Other objects of my improvement willappear from the description hereinafter and the features of noveltythereof will be pointed out in the appended claims.

In the accompanying drawings, which show an example of my improvementfor illustrative and descriptive purposes, Figure l is a sectional viewof my improved valve in operative position on a tank or otherreceptacle; Fig. 2 is a horizontal section on the line 2-2 of. Fig. land Fig. 3 is an exterior elevation thereof.

As shown in the drawings my improved valve comprises an outer orexternal hollow member 5 open at its one end and having its opposite endclosed and shaped in any suitable manner, as for instance in the form ofa dome as illustrated in the drawings, said member 5 being provided witha pinrality of apertures 6, whereby communication is established betweenthe interior of the member 5 and the atmosphere. In the preferred formthese apertures 6 extend from the open end of the member 5, or in otherwords are located at the base thereof and as shown in the drawings maysimply comprise saw cuts of suitable dimensions. My improved valvefurther comprises an inner member having a hollow body 7 fitted withinthe open end of the outer member 5 and preferably, though notnecessarily secured therein in any suitable as by means of solder, theends of the inner and outer members being preferably flush. The body 7of this inner member has an outer surface 8 sloping downwardlysubstantially throughout its entirety from a central point toward theapertures 6 for instance in the form of a dome as illustrated in Fig. 1.A

Specification of Letters Patent.

Patented Aug. 17, 1920. Serial No. 145,448.

tubular spout 9 projects from the body 7 of the inner member into closeproximity to the lnner surface of the closed end of the outer member 5and establishes communication between the interior of the outer andinner members as shown in Fig. 1.

I n practice my improved valve is secured 111 any suitable manner, as bysoldering, upon the outer surface of the tank or recep tacle 10 and inregistry with a vent opening 11 formed therein. The diameter of theopening 11 preferably corresponds to the interior diameter of the body 7of the inner member, the parts being so combined that the opening 11 isin substantial registry with the open end of the body 7 as shown in Fig.1.

\Vith my improved arrangement air is freely admitted to the interior ofthe tank or receptacle 10 at all. times by way of the apertures (3,spout 9 and hollow body 7 of the interior member, thus permitting thecontents for instance to be readily withdrawn. At the same time theconstruction prevents any water, moisture or other foreign matterfrom-entering the interior of the tank 10 even if the latter issubjected to a drenching as for instance during the washing of a motorcar, assuming that the tank 10 forms part of a motor cars equipment.This is due to the fact that the body 7 of the interior member forms aseal and because the free end of the spout 9 is located at a distanceabove the tank 10 and in close proximity to the end of the outer member5 which forms a protecting cover. Any moisture, water or other foreignmatter which may find its way or be forced into the interior of themember 5 will simply flow or otherwise pass downwardly along the slopingouter surface 8 of the body 7, and out through the apertures G to theexterior of the tank 10. It will be noted that said apertures 6 do notcommunicate directly with the interior of the tank 10 and that it issubstantially impossible for any appreciable quantity of any foreignmatter to reach the interior of a tank or other re ceptacle equippedwith my improvement.

In some cases the outer meml er 5 may be oetachably connected with thebody 7 of the inner member and secured in operative connection therewithby friction or in any other suitable manner.

My improvement is simple in construction, eflicient in operation and isreadily combined even with existing tanks or other receptacles.

It will of course be understood that the body 7 instead of being domeshaped may be otherwise constructed to provide an equivalentarrangement, a conical construction for instance being suitable for theintended purpose.

Various changes in shown and described may be made within the scope ofthe claims without departing from the spirit of my invention.

1. An air vent of the kind described comprising an inner hollow memberhaving an opening whereby communication with its interior is establishedand having a sloping outer surface and a hollow outer member coveringsaid inner member and having its one end open and fitted over said innermember in surface contact therewith, said I outer member having anaperture located at the foot of the slope of said inner member wherebycommunication between the atmosphere and the lnteriorsof said inner andouter members is established.

2. The combination of a receptacle having a vent opening, a dome shapedhollow member secured to said receptacle in registry with said opening,a tubular spout projectthe specific form ing in an axial direction fromsaid member, and an outer dome shaped hollow member fitted tangentiallyover said inner dome shaped member and having the inner surface of itsclosed end in close proximity to he free end 01" said spout, said outermember being provided at its base withan aperture whereby communicationbetween the interior of said outer member and the atmosphere isestablished.

Signed at the city of New York in the county of New York and State ofNew York.

CARL F. NYSTROM.

